This article is written for Choke Manifold used in API 16C drilling well-control and choke/kill manifold service. The product should be confirmed by its real oilfield service position, not only by a short catalogue name. For API oilfield equipment, the useful specification combines pressure rating, nominal size, end connection, service condition, material or seal requirements, and inspection documents.
The choke manifold is essential equipment for oil and gas well pressure control. It is mainly used during well-control operations to throttle, regulate, and control wellhead pressure, working with related well-control equipment to provide pressure relief, backpressure control, and safe circulation. It is an important well-control system for drilling, well testing, and workover operations.
Products can be specially designed and manufactured according to field service conditions, well-control system configuration, and line connection requirements to meet choking requirements under different pressure ratings and site layouts. Cold working pressure ranges from 3,000 psi (21 MPa) to 15,000 psi. Flange nominal sizes include 2-1/16", 2-9/16", 3-1/8", and 4-1/16". Applicable fluids include mud, oil, natural gas, and similar media.
When an old part has unclear markings, replacement should be based on measured dimensions, end-connection photos, body markings, pressure records and installation position, not only on appearance.
Key points to confirm
For Choke Manifold, we normally recommend confirming the following items before quotation, production or replacement.
- Applicable standard or project requirement: API 16C.
- Working pressure, test pressure, nominal size and bore requirement.
- End connection type, mating equipment, flow direction and installation space.
- Service condition such as standard service, NACE sour service or low-temperature service.
- Required documents such as MTC, pressure test report, NDT report and third-party inspection.
Field use and inspection
Choke Manifold should be checked as part of the complete high-pressure system. Sealing surfaces must be protected, connections should be clean before make-up, and the product should not be forced into alignment by side load, hammering or pulling. If leakage, abnormal operation or pressure-test instability occurs, the model, pressure, medium, photos and test conditions should be recorded for technical review.
Information for quotation
For new projects, please provide the line layout, operating pressure, medium, temperature, connection standard and document requirements. For replacement work, old-part photos, nameplate or body markings, end-connection close-ups and installation position help us confirm the correct Choke Manifold quickly.